return sb.toString();
    }

    /**
     * Checks if the client is connected to the witness service.
     *
     * @return true if connected
     */
    public boolean isConnected() {
        return connected && rpcHandle != null;
    }

    @Override
    public void close() {
        if (connected && rpcHandle != null) {
            try {

    @Mock
    private CIFSContext cifsContext;

    @BeforeEach
    void setup() {
        // Tree handle lifecycle and config
        lenient().when(tree.acquire()).thenReturn(tree);
        lenient().when(tree.isConnected()).thenReturn(true);

        // CIFS context returns same config to build responses during initResponse
        lenient().when(cifsContext.getConfig()).thenReturn(config);
    }

    @AfterEach

                ftpClient.disconnect();
            } catch (final IOException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to disconnect FTP client: connected={}", ftpClient.isConnected(), e);
                }
            }
        }
        if (logger.isDebugEnabled()) {
            logger.debug("FTP client closed");
        }
    }

    /*
     * (non-Javadoc)
     *

            }
        }, 30, TimeUnit.SECONDS);
    }
    
    private boolean testWitnessService() {
        // Simple connectivity test
        return client != null && client.isConnected();
    }
    
    private void reregisterNotifications() {
        // Re-register all previous registrations
        // Implementation would store registration details for recovery
    }
}
```

     *
     */
    synchronized SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        // Optimization: Check connection validity more efficiently
        if (this.treeHandle != null && this.treeHandle.isConnected()) {
            // Connection is still valid - reuse it
            return this.treeHandle.acquire();
        }

        // Clean up old handle if needed